Long Drop Single Tension Wire Spotlight

Do the fixtures to the power wires come with them?
The image shows the lamp holder and the clamps that pierce the tension wire. These are supplied.

Are these lights dimmable?
Yes - When used with dimmable bulbs and transformer.

From previous questions I think I am right in these can be used on an existing system with wires 60mm apart. If not what do you have that does? Many thanks.
Yes, these can be used with wires 600mm apart, you can use either the 300mm or 500mm - both would work but remember the wires cannot be snipped.

Can the wires that fix to the tracks be trimmed? Our wire tracks are only 65mm apart and be useful to trim them to size.
The wires on this fitting can not be modified.

What distance track do the lights fit onto? My existing track is approx 5inches.
This long drop allows you to adjust the suspension up and down, and the 500mm long drop would fit your existing track distance.

What is the spacing between the two tension wires?
The arms on these are flexible to suit your system. For a width of 120mm or less you could use the 300mm suspension model, for anything above this we`d suggest the 500mm model.